Burner and heater



' Jan. 2, 1923.

T. R. cA-MPELL.-

BURNER AND HEATER.

FILED DEc.l0.1921.

isaiasi 'riorfrns a. CAMPBELL, or SAN Dine-o, cALrroiiNrA, assiettes or GNN-Hann" 'r JOHN a. cAa'rsLn', on saN ninos; camionista.

v BURNER n-Nn tenerne.

Application le December l0, 192.1. i Serial No. 521,441.

To allor/)720m t may concern: y

Be it lnoivn that l, THOMAS, R. CAMPBELL, a citizen ot the United States, residing at SanDiego, in the county of San Diego and ot California, have invented neav` and useful Improvements in Burners and Heaters, of which the `following is a. specification. l v i T his invention relates to improvements in burners and heaters used for soldering, brazing, welding, preheating in connection with acetylene or other autogenous Welding, burning oil paint and other like purposes.

The principal object ot this invention is to provide means in the form of spiral `grooves provided in the casing ot the device and positioned about the combustiony or ieating tube thereof, so that the casing can be readily freed of 'carbon or other deposits, which cleaning action cannot be easily pcrformed ivhen the usual spiral coils, as now employed, encircle the heating tube or are disposed yWithin the same. y

tui-ther object ot' this invention is to provide a heating` tube ot such construction that it can be readily replaced in the casing` at a minimum cost and thus provide a bur ner which ivill be economical to manufacture and yet at all times highly serviceable and etiicient. y y

Utl/1er objects and advantages will be apparent during the course of the following description.

ln the accompanying drawings forming a 'gi-art ot this specification and in which like numerals are employed to designate like parts throughout the same, A.

Fig. l is a vertical central longitudinal section through the burner on the line l-l of Fig. 3, y y

lFig. 2 is a side elevation ot the burner,` and y Fig. 3 is a sectional view through the device. on the line 3-*3 of Fig. 2.

in the accompanying drawings wherein tor `the purpose ot illustration is shown a preferred embodiment oil my invention, the numeral 5 designates a casing centrally bored as at 6 and having a plurality of spiral grooves formed therein and so positioned lith relation to the casing that they surround a tube S inserted in the bore ot the casing. iidapted to communicate With the i; ii l grooves adiacentthe liront ot the casing is a short passageway 9 formed at a right spiral grooves toA advantage in Fig. yl thel passageway l1 is formed in an extension il Aof thecasing, Whichez'itension has connectedy thereto a tubular valve casing 13 providedwith a channel lil which leads to the passageway 1l. in this passageway 14; thereJ is provided theconventional form of needle valve l5.

Disposed inthe loyver portion ofthe cas-l ing 5 andr formed integral therewith isa dependiiigvvertica'l portion i6' provided with a distorted channel 17 ivhich is adapted to lcommunicate with the rear extremity of the spiral grooves 7k. The numeial i9 designates a cup or priming pan which is ydetachably secured to the vertical portion 16 by alocting nut 20. rlhis priming pan is adapted to hold the liquid used in the initial heating of the tube and, as conventionally used, the pan` 'is tirst filled trom a container` or receptaclell which serves as a source ot 'fuel supply. The liquid then in the priming pan altords a loluicli and elicient heating and priming medium prior tothe direct use of the device as a. burner. YF rom this construction it will be apparent that liquid to beburned as fuel, atter the initial priming action has been completed, will pass from the receptacle 21 through the 7 and then into the respective communicating passagevvays and finally into the enlarged passageway lll, By virtue of the construction ot' the needle valve vl5 the discharge from its nozzle 22 Will be' regulated and limited and thus the 'fuel will be only discharged after being converted into a highly combustible gas. y

It is Well known in a device of this nature, that the conversion ot the liquid to a. is caused by a continued and intensive heating process that the liquid is subjected to, as it passes through either the heater per se, or the spiral coils ot the device. ln this device. as the liquid passes through 'the spiral grooves and circulates about the heei tube d, the heat is maintained by a continueffl irc combustion ot the gas as itis discharged 4trom the nozzle122wof the valve casing 13.

and then passes through the tubeS for use beyond the front extremity of thesarne.

Bynemploying thespiral grooves 7 it willv be obvious that I have entirely avoided the use of the ordinary spiral coils, which either surroundthe heating tube or are/disposedy therein, the construction ofthe said coils,

making them difficult tobe cleanedand ireed `ofthe usual .carbon or other deposits. With my improved burner `itis only necessary to remove the heating or combustion' tube Scand access be had to the spiral grooves lor .thel purpos'ejof readilycleaning the same,

"by'use of 'any conventional cleaning article,

preferably-"constructed vof vrwire,`.that .may

suggest itself to the'user` or manufacturer.'

Itihas'also been; experienced heretofore that'the metal, of the heating or combustion tubefisof suchr a nature, that after being the heating orcombustion tube'ispractically heatedV for `any length of time, 'itwill become oxidized and isy then apo'or conductor of heat.` kIn devices so constructed it is necessary to purchase a new burner, because useless. Byemploying the heating-tube 8 detachably secured in the'casing, l have overcome this/disadvantage, `because the heating tube employed 1n this device, when heated for. a length lof time and accordingly y oxidized, can` vbe Vreadily replaced,- "at" a nominalcost/without in any way 'diminishing the eectiveness of the casing and the associated'parts'of the burner.

To prevent .the danger of the tube 8 being accidentally displaced, I have .provided 'a binding nut23, which is threaded, as shown to advantage in Figure l, on the Vrear eX- tremity oi'y the tube 8 and serves to retainv the tube inthe casing. The tube 8 hask a flange or external taper on the front 'end n Whichis brought to a tight lit in the casing by means of the binding nut 23.' While not necessary to make .an .eliicient burner, but in order to facilitate the removal of the tube.

8 after the burner has been used, `a thin flexible 'copper tube 24 isinterposed between the vtube 8 andthe casing. Bya consideration Aof Figure l,`it will beobserved, that' the copper tube serves as a gasketitor the yfront end of the tube 8 and by being vbent adjacent its rear extremity serves also as an an-' nular gasket for the binding nut 23. When it is desired'to extract the tube 9, it is .only

' necessary to remove thenut 23 therefrom and then the tube can be withdrawn from the body of the casing by any conventional eX- tracting implement.

rFhe riminfr an betorel'ieterredto ispreferably used when the device is employed as a'blow torch. As shown rto advantage in Figure l, it is manifest thatthe pan can be readily detached from the feed tube 16,

pand 'the burner can then be' used. `without v scribed.

the pan. The feedtubecan positioned in a plane parallel to the plane of the tube 8; `While l have shown `the feed' tube" 16 in*n jtegrally formed with the casing 5 and directlyconnected tothe fuel reservoir, itis to be understood thata'lexible connection can be made between the said casing and the-reservoir, and then the reservoircan be positioned at a distance remote from the burneritsr-flt.V4 1

llt is to be lunderstood that the form olimy` invention herewith shown and described is to be taken as a preferredexamplejotl thev i same, and thatvarious changes inthe shape, vsize andarrangement of parts., may be resorted to without departing Y:from the spirit of the inventionorthe .scope of the subjoined claims. v

Having thus c described ymy invention,v I claim: M f l.' A device of the .character rdescribed comprising, a casing, providedy with aV ce1isol tral bore and havingv a" plurality offcontinuous spiral groovesv and communicat ing` angular passageways, a. combustion tube de-` 'vtachably positioned inthe bore of said ycasing, and means connected to said casing for supplying fuel through thegrooves'ot the r passageways of said casing to thesaid tube,

substantially jas and for the purpose 'de- 2."In a device `ofthe v,character described .the combination, with a casing having acentral bore provided therein and a plurality of n continuous spaced spiralgrooves andcommunicating angular passageways, of a manually controlled needle valve'connected to said casing and having apassagewayv therein communicatingwith the passageways of said casing, 'and a fuel containerconnected to an extension of the casingfhaving a distorted passageway therein vadapted to permit the supply of fuel to 'be'fed to said tube through the medium of the grooves and passageways of said casing;

3. In a device of thecharacterdescribed lthe combination with-a casing havinga central bore provided therein and a plurality of continuousfspaced spiral grooves and communicating angular passageways, "of a manually controlled needle valve connected'I to. said casing and having'ja 'passageway 'comprising a tubular casing having a plu! rality oit' spiral groovesand communicating passageways therein, a tlnnmtube positioned in the bore or' said easing and having its rear extreniity bent at a right angle to 'the body of the tube so as to provide a gasket, a combustion tube positioned Within said thin tube and provided with a binding nut on its rear extremity adapted to engage the gasket of the said thin tube, and means oonm neeted to seid casing for supplying fuel through the grooves sind passageweys of said easingv to the said tube, substantially as and for the purpose described.

in 'testimony whereof affix my signuture.

THGMS R. CAMPBELL. 

